text: /*
   * FreeRTOS Kernel V10.3.1
   * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy of
   * this software and associated documentation files (the "Software"), to deal in
   * the Software without restriction, including without limitation the rights to
   * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
   * the Software, and to permit persons to whom the Software is furnished to do so,
   * subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
   * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
   * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
   * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   *
   * http://www.FreeRTOS.org
   * http://aws.amazon.com/freertos
   *
   * 1 tab == 4 spaces!
   */
  
  #ifndef PORTMACRO_H
  #define PORTMACRO_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #include <machine/cpu.h>
  
  /*-----------------------------------------------------------
   * Port specific definitions.
   *
   * The settings in this file configure FreeRTOS correctly for the
   * given hardware and compiler.
   *
   * These settings should not be altered.
   *-----------------------------------------------------------
   */
  
  /* Type definitions. */
  #define portCHAR		char
  #define portFLOAT		float
  #define portDOUBLE		double
  #define portLONG		long
  #define portSHORT		short
  #define portSTACK_TYPE	uint32_t
  #define portBASE_TYPE	long
  
  typedef portSTACK_TYPE StackType_t;
  typedef long BaseType_t;
  typedef unsigned long UBaseType_t;
  
  #if( configUSE_16_BIT_TICKS == 1 )
  	typedef uint16_t TickType_t;
  	#define portMAX_DELAY ( TickType_t ) 0xffff
  #else
  	typedef uint32_t TickType_t;
  	#define portMAX_DELAY ( TickType_t ) 0xffffffffUL
  #endif
  /*-----------------------------------------------------------*/
  
  /* Architecture specifics. */
  #define portSTACK_GROWTH							( -1 )
  #define portTICK_PERIOD_MS							( ( TickType_t ) 1000 / configTICK_RATE_HZ )
  #define portBYTE_ALIGNMENT							4
  #define portNOP()									__asm__ volatile ( "mov r0, r0" )
  #define portCRITICAL_NESTING_IN_TCB					1
  #define portIRQ_TRAP_YIELD							31
  /*-----------------------------------------------------------*/
  
  /* Task utilities. */
  
  extern void vPortYield( void );
  
  /*---------------------------------------------------------------------------*/
  
  #define portYIELD()		asm __volatile__( " trap #%0 "::"i"(portIRQ_TRAP_YIELD):"memory")
  /*---------------------------------------------------------------------------*/
  
  extern void vTaskEnterCritical( void );
  extern void vTaskExitCritical( void );
  #define portENTER_CRITICAL()		vTaskEnterCritical()
  #define portEXIT_CRITICAL()			vTaskExitCritical()
  /*---------------------------------------------------------------------------*/
  
  /* Critical section management. */
  #define portDISABLE_INTERRUPTS() 	cpu_int_disable()
  #define portENABLE_INTERRUPTS() 	cpu_int_enable()
  
  /*---------------------------------------------------------------------------*/
  
  #define portYIELD_FROM_ISR( xHigherPriorityTaskWoken ) if( xHigherPriorityTaskWoken != pdFALSE ) vTaskSwitchContext()
  
  /*---------------------------------------------------------------------------*/
  
  #define portSAVE_CONTEXT()				\
  	asm __volatile__																								\
  	(																												\
  		"sub	r1, #68					\n" /* Make space on the stack for the context. */							\
  		"std	r2, [r1] + 	0			\n"																			\
  		"stq	r4, [r1] +	8			\n"																			\
  		"stq	r8, [r1] +	24			\n"																			\
  		"stq	r12, [r1] +	40			\n"																			\
  		"mov	r6, rtt					\n"																			\
  		"mov	r7, psr					\n"																			\
  		"std	r6, [r1] +	56			\n"																			\
  		"movhi	r2, #16384				\n"	/* Set the pointer to the IC. */										\
  		"ldub	r3, [r2] + 2			\n"	/* Load the current interrupt mask. */									\
  		"st		r3, [r1]+ 64			\n"	/* Store the interrupt mask on the stack. */ 							\
  		"ld		r2, [r0]+short(pxCurrentTCB)	\n"	/* Load the pointer to the TCB. */								\
  		"st		r1, [r2]				\n"	/* Save the stack pointer into the TCB. */								\
  		"mov	r14, r1					\n"	/* Compiler expects r14 to be set to the function stack. */				\
  	);
  /*---------------------------------------------------------------------------*/
  
  #define portRESTORE_CONTEXT()																						\
  	asm __volatile__(																								\
  		"ld		r2, [r0]+short(pxCurrentTCB)	\n"	/* Load the TCB to find the stack pointer and context. */		\
  		"ld		r1, [r2]				\n"																			\
  		"movhi	r2, #16384				\n"	/* Set the pointer to the IC. */										\
  		"ld		r3, [r1] + 64			\n"	/* Load the previous interrupt mask. */									\
  		"stb	r3, [r2] + 2  			\n"	/* Set the current interrupt mask to be the previous. */				\
  		"ldd	r6, [r1] + 56			\n"	/* Restore context. */													\
  		"mov	rtt, r6					\n"																			\
  		"mov	psr, r7					\n"																			\
  		"ldd	r2, [r1] + 0			\n"																			\
  		"ldq	r4, [r1] +	8			\n"																			\
  		"ldq	r8, [r1] +	24			\n"																			\
  		"ldq	r12, [r1] +	40			\n"																			\
  		"add	r1, #68					\n"																			\
  		"rti							\n"																			\
  	 );
  
  /*---------------------------------------------------------------------------*/
  
  /* Task function macros as described on the FreeRTOS.org WEB site. */
  #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
  #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
  /*---------------------------------------------------------------------------*/
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* PORTMACRO_H */
  